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  <title>Unsets the value at the specified index</title>
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  <div id="layout-content"><div id="arrayobject.offsetunset" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ArrayObject::offsetUnset</h1>
  <p class="verinfo">(PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">ArrayObject::offsetUnset</span> &mdash; <span class="dc-title">Unsets the value at the specified index</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-arrayobject.offsetunset-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>ArrayObject::offsetUnset</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.declarations.html#language.types.declarations.mixed" class="type mixed">mixed</a></span> <code class="parameter">$key</code></span>): <span class="type"><span class="type void">void</span></span></div>

  <p class="para rdfs-comment">
   Unsets the value at the specified index.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-arrayobject.offsetunset-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">key</code></dt>

     <dd>

      <p class="para">
       The index being unset.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-arrayobject.offsetunset-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   没有返回值。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-arrayobject.offsetunset-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3745">
    <p><strong>示例 #1 <span class="methodname"><strong>ArrayObject::offsetUnset()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$arrayobj&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">ArrayObject</span><span style="color: #007700">(array(</span><span style="color: #0000BB">0</span><span style="color: #007700">=&gt;</span><span style="color: #DD0000">'zero'</span><span style="color: #007700">,</span><span style="color: #0000BB">2</span><span style="color: #007700">=&gt;</span><span style="color: #DD0000">'two'</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">$arrayobj</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">offsetUnset</span><span style="color: #007700">(</span><span style="color: #0000BB">2</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$arrayobj</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
object(ArrayObject)#1 (1) {
  [0]=&gt;
  string(4) &quot;zero&quot;
}
</pre></div>
    </div>
   </div>
  </p>
 </div>

 
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